DD283090A5 - HYDRAULIC CLAMPING DEVICE WITHOUT TURNING - Google Patents

Abstract

The invention includes a hydraulic tensioning device without Drehdurchfuehrung. The invention relates to a clamping device for rotating, vertical, rotationally symmetric hollow body, wherein the interior can be edited over the entire height. Here, the tensioning by means of compression spring and the relaxation by means of hydraulic drive. The use of the clamping device can be used in general mechanical engineering, in the appliance industry and in the automotive industry for coloring, finishing and surface modification of Innenflaechen. When relaxing, a ring is moved by the drive cylinder, which retracts the clamping jaws from the workpiece via special slots. A hydraulic Drehdurchfuehrung is no longer necessary. The device can be realized with little manufacturing effort, it is universally applicable and beyond largely maintenance-free. Relax operation; Hydraulic drive; Relax; Jaw}

Description

withdrawn, so that the workpiece is released. For clamping, the working cylinders return to the starting position, the springs press the clamping jaws against the workpiece and clamp it. This creates an air gap between the slopes of the ring and the clamping pieces.

Ausführungsbeisplel

The invention will be explained in more detail below using an exemplary embodiment. The accompanying drawings show

Fig. 1: The clamping device in plan view

Fig.2: The clamping device in section with the workpiece clamped

Fig. 3: The clamping device in section with dissolved workpiece.

Construction and operation of the hydraulic tensioning device:

The workpiece 1 is arranged centrally in a receiving piece 2. Three offset by 120 ° arms are connected to the receiving piece 2 and each carry a sleeve-shaped body. These are in the plane above the receiving piece 2. In each of these bodies, a bolt 5 is slidably mounted, which is enclosed by a spring Λ and connected to a clamping jaw 3. In extension of the bolt 5, a clamping piece 6 connects in the form of a ring segment. This has an outwardly and downwardly directed slope. The entire arrangement described so far can be set in rotary motion. Fixed are in the housing 9 of the device three offset by 120 ° working cylinder 8 is mounted, which carry a ring 7, which is provided with an upwardly and outwardly directed slope. If the working cylinder 8 is extended, the bevel of the ring 7 engages positively in the bevels of the clamping pieces 6 and pulls them back together with the bolts 5 and the clamping jaws 3 against the force of the spring 4. The workpiece 1 is released. When the working cylinders 3 return to their starting position, the springs 4 press the clamping jaws 3 against the workpiece 1. An air gap is created between the clamping piece 6 and the ring 7.

Claims (2)

-1- 283 OSD claim: Hydraulic tensioning device without rotary feedthrough for circumferential, vertical, rotationally symmetrical hollow body, characterized in that three rotatably offset by 120 ° and outwardly facing arms are arranged on a rotatable cylindrical receiving piece (2) each carry a sleeve-shaped body, which in a plane above the Receiving piece (2) is located and in the interior of a horizontal bolt (5) by a compression spring (4) is included, which is behind a vierflächigen clamping jaw (3), the bolt (5) a clamping piece (6) with downwards and outwards showing slope, which is loosely supported on a ring (7), which is in communication with hydraulic working cylinders (8). For this 2 pages drawings Field of application of the invention The invention relates to a hydraulic clamping device without rotary feedthrough for fixing the position for perpendicular, rotationally symmetrical hollow body, which must rotate in this position. The hollow body can be processed throughout the interior. This clamping device is mainly used on devices or machines where internal machining in the described position over the entire height is required. In particular, in general mechanical engineering, in the equipment industry and vehicle industry for coloring, fine machining, surface modification if da.s tool is stationary and the workpiece must rotate. Characteristic of the known state of the art As tensioning device for above-mentioned workpieces and position, only the external or internal clamping by means of three-jaw chuck or the solution set forth in the patent DE 2805860 are known. When using these mechanisms of action editing over the entire height is not possible and the free accessibility of the interior of both end faces not given. Both technical solutions are difficult to automate. If hydraulic drives are to be used, then these clamping mechanisms postpone rotary unions. These rotary joints require a high technical effort for sealing, a high degree of complexity of the components, high manufacturing accuracy and maintenance intensity. The risks mentioned in practice often lead to such solutions being discarded from the outset and resorting to a manual mode of operation. This leads to quality losses, combined with high production costs and costs. Object of the invention The object of the invention is to provide a hydraulic tensioning device, are clamped with the rotating, vertical components for processing and after treatment, the device can be relaxed without having to take a complicated hydraulic rotary feedthrough to complete. Furthermore, the component is to be treated internally over the entire height. For this purpose, the unhindered accessibility of both end faces to allow. Workpieces of different diameters are to be tensioned with a low tolerance to tolerance and a high repeat accuracy in such a way that reliable torque transmission is possible. Furthermore, a good automation with high reliability and low maintenance should be given. Explanation of the essence of the invention The invention has for its object to develop a hydraulic tensioning device by means of which a torque is transmitted to a vertical workpiece to be machined, the good accessibility of the interior must be given by both end faces. Risky components are turned off and conditions are created by reliable mechanisms that perform the clamping or relaxation process exactly and in an advantageous manner. According to the invention the object is achieved in that a cylindrical receiving piece has three offset by 120 ° outwardly facing arms. On each of these arms is a sleeve-shaped body in a horizontal position in which a bearing and provided with a compression spring bolt with replaceable jaw slides. In extension of the said bolt is followed by a clamping piece in the form of a ring segment with down and showing Nose slope. The entire unit described above is rotatably arranged. Fixed to the device housing three offset by 120 ° hydraulic clamping cylinders are arranged, which are connected to a rotary unit comprehensive, provided with an upwardly and outwardly directed bevel ring. The separation of the rotating clamping mechanism from the fixed actuating mechanism, ensures a simplified design, low operating and maintenance costs and high reliability. The existing degree of complicity does not require the use of special machines, technologies ufid materials. In the relaxed state acts by the extension of the clamping cylinder aie slope of the Hinges positively on the slope of the three Spannstückö. Thereby these become together with bolts and clamping jaw